I made a beeline to the treehouse as it was glowing, but spent about a minute trying to get in or climb the ladder. I didn't realise it was a shop until I read the game's description, which slightly defeats the point of the brief. I think this game would really benefit from some tutorialisation, maybe some diagrams, to explain what I was meant to be doing at the start.
The visuals are well-executed and it's clear you're going for a minecraft/terraria inspired look. The music is quite melancholic - I spent my earnings on the second track in the shop thinking it would be a bit more fitting for a dwarf heading down the mines, but it maked me feel more like I was laying a cherished pet to rest. I thought varying the pitch of the sound effect when mining metals was a good touch. I also liked the zoom out to reveal more of the map.